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Diffstat (limited to '')
-rw-r--r-- | drivers/clk/versatile/clk-versatile.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/drivers/clk/versatile/clk-versatile.c b/drivers/clk/versatile/clk-versatile.c new file mode 100644 index 000000000..8ed7a179f --- /dev/null +++ b/drivers/clk/versatile/clk-versatile.c @@ -0,0 +1,98 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Clock driver for the ARM Integrator/AP, Integrator/CP, Versatile AB and + * Versatile PB boards. + * Copyright (C) 2012 Linus Walleij + */ +#include <linux/clk-provider.h> +#include <linux/err.h> +#include <linux/of.h> +#include <linux/of_address.h> + +#include "icst.h" +#include "clk-icst.h" + +#define INTEGRATOR_HDR_LOCK_OFFSET 0x14 + +#define VERSATILE_SYS_OSCCLCD_OFFSET 0x1c +#define VERSATILE_SYS_LOCK_OFFSET 0x20 + +/* Base offset for the core module */ +static void __iomem *cm_base; + +static const struct icst_params cp_auxosc_params = { + .vco_max = ICST525_VCO_MAX_5V, + .vco_min = ICST525_VCO_MIN, + .vd_min = 8, + .vd_max = 263, + .rd_min = 3, + .rd_max = 65, + .s2div = icst525_s2div, + .idx2s = icst525_idx2s, +}; + +static const struct clk_icst_desc cm_auxosc_desc __initconst = { + .params = &cp_auxosc_params, + .vco_offset = 0x1c, + .lock_offset = INTEGRATOR_HDR_LOCK_OFFSET, +}; + +static const struct icst_params versatile_auxosc_params = { + .vco_max = ICST307_VCO_MAX, + .vco_min = ICST307_VCO_MIN, + .vd_min = 4 + 8, + .vd_max = 511 + 8, + .rd_min = 1 + 2, + .rd_max = 127 + 2, + .s2div = icst307_s2div, + .idx2s = icst307_idx2s, +}; + +static const struct clk_icst_desc versatile_auxosc_desc __initconst = { + .params = &versatile_auxosc_params, + .vco_offset = VERSATILE_SYS_OSCCLCD_OFFSET, + .lock_offset = VERSATILE_SYS_LOCK_OFFSET, +}; +static void __init cm_osc_setup(struct device_node *np, + const struct clk_icst_desc *desc) +{ + struct clk *clk; + const char *clk_name = np->name; + const char *parent_name; + + if (!cm_base) { + /* Remap the core module base if not done yet */ + struct device_node *parent; + + parent = of_get_parent(np); + if (!parent) { + pr_err("no parent on core module clock\n"); + return; + } + cm_base = of_iomap(parent, 0); + of_node_put(parent); + if (!cm_base) { + pr_err("could not remap core module base\n"); + return; + } + } + + parent_name = of_clk_get_parent_name(np, 0); + clk = icst_clk_register(NULL, desc, clk_name, parent_name, cm_base); + if (!IS_ERR(clk)) + of_clk_add_provider(np, of_clk_src_simple_get, clk); +} + +static void __init of_integrator_cm_osc_setup(struct device_node *np) +{ + cm_osc_setup(np, &cm_auxosc_desc); +} +CLK_OF_DECLARE(integrator_cm_auxosc_clk, + "arm,integrator-cm-auxosc", of_integrator_cm_osc_setup); + +static void __init of_versatile_cm_osc_setup(struct device_node *np) +{ + cm_osc_setup(np, &versatile_auxosc_desc); +} +CLK_OF_DECLARE(versatile_cm_auxosc_clk, + "arm,versatile-cm-auxosc", of_versatile_cm_osc_setup); |